E12, HKI, voc, gram

Most reptiles have three chambers in their hearts, ______ some do have four.

• in spite
• although
• despite of
• so long as

Mammals, ____ are warm-blooded, meaning that they generate their own body heat and are thus more tolerant of temperature extremes.

• On the other hand
• In contrast
• In short
• In conclusion

Birds and mammals, ____ they are warm blooded, move more swiftly and have greater physical endurance than reptiles.

• although
• thus
• because
• besides

We should set our printer's default ______ it prints on both sides of the page.

• Besides
• and
• so
• therefore

Your computer may go to sleep, ______ it's still consuming energy.

• but
• even though
• so
• furthermore

We use compact florescent light bulbs, ____ last 10 times longer than incandescent bulbs.

• what
• that
• which
• they

We should keep our freezer full ____ it runs more efficiently than an empty one.

• therefore
• but
• so
• because

These eggs come from free-range chickens _______ eat only organic grains.

• Which
• what
• who
• they

Plant shade trees to reduce summer heat _______ reduce watering needs in summer months.

• and
• but
• so
• or

It has been said that the wars of the future will not be fought over lan ____, they will be fought over the water supply.

• However
• Besides
• Instead
• Therefore